/Engine/Source/Runtime/Landscape/Classes/Materials/MaterialExpressionLandscapeVisibilityMask.h
Callback to get any texture reference this expression emits. This is used to link the compiled uniform expressions with their default texture values. AnyUMaterialExpressionwhose compilation creates a texture uniform expression (eg Compiler->Texture, Compiler->TextureParameter) must implement this.
virtual [UObject](API\Runtime\CoreUObject\UObject\UObject) * GetReferencedTexture() const